Medium Duty Fletcher Permastop® Building Blanket Insulation

$ 8.33$ 12.17 p/m2 inc. GST

Delivery available
✘ No warehouse pickups

Light Duty Permastop Blanket is made with Sisalation® reflective foil facing on one side to act as a barrier against condensation forming on the underside of metal roofs.

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Medium Duty Fletcher Permastop Building Blanket for Roofs

To increase the comfort and energy efficiency of the buildings we work and live in, the right choice for effective insulation performance is Fletcher Permastop Blanket. As more and more buildings, both commercial and domestic, are being built with metal deck roofing and metal wall cladding the need to install the right insulation is crucial.

The Benefits of Permastop in Residential Homes

Reduce Excessive Noise

There’s a certain Australian charm about a metal roof. They look great and the sound of gentle rain on the roof is music to the ears for some. It’s when the sound of heavy rain or even hail reaches a deafening crescendo that they can be noisy and uncomfortable. Permastop insulation blanket fixed directly under the metal roof is effective in reducing the noise levels entering homes from rain, hail, aircraft and other outside noises. 75mm Permastop can reduce sound transmission through the roof by up to 18dB (A). Now residential homes can have the character of a metal roof without the compromise.

Reduce Heating and Cooling Loss

Permastop has the added benefit of providing homes with proven thermal insulation to give you energy savings and makes homes even more comfortable. Permastop used in conjunction with Pink BattsTM or Fat Batts® in the ceiling gives even more effective insulation performance. In Australia’s hotter areas Fletcher Permastop with Sisalation® reflective foil facing is particularly effective in reducing heat entering the roof space. Use Permastop to maximize your ceiling insulation performance and increase all year round comfort.

Reduce Condensation in Ceilings

Permastop is made with Sisalation® reflective foil facing on one side. This combination acts as an effective barrier against condensation forming on the underside of metal roofs. Especially when warm, moist air is vented into the roof space from bathroom and kitchen fans and vented range hoods. Moisture forming inside roof spaces can cause problems with mould forming and cause other forms of water damage to the structure.

A diagram showing what happens to home with no insulation. There are big energy losses in Summer and WinterA diagram showing how insulation works in home in Winter and Summer

Reduce High Energy Bills

By using Permastop under metal roofs, along with Pink Batts or Fat Batts in ceilings and walls will help make the home cooler in summer and warmer in winter. Insulation is one of the most cost effective building materials home builders can use to reduce energy bills. Combined with common sense design elements like shading windows from summer sun and weatherstripping doors and windows, homes will be more comfortable and reduces the cost of artifical heating and cooling.

The right thermal insulation

Permastop glasswool blanket insulation faced with Sisalation® is available in material R-value of R1.3, R1.8, R2.5 and R3.0 and nominal thickness of 55mm, 75mm, 100mm and 130mm. With the requirements of the Building Code of Australia demanding a Total R-Value of R3.2 in many constructions you can be confident that correctly installed, Fletcher Permastop will comply. Installing the correct insulation greatly improves the comfort of occupants by reducing the extremes of temperature and thereby reducing the need for artificial heating and cooling saving money and helping the environment.

The right acoustic insulation

Fletcher Permastop Insulation Logo

Metal Deck roofing and wall cladding is a popular choice due to it’s lightweight, economy and suitability for the Australian climate. While many people enjoy the sound of rain on the roof it can become deafening in extreme conditions, especially hail. Permastop is not only an effective thermal insulation but acts as a baffle to reduce sound transmission both from outside and inside sources. The acoustic performance of 75mm Fletcher Permastop can reduce rain noise by as much as 18dB(A) compared to a metal roof with no insulation. Permastop also stops noise from the rapid expansion of metal deck roofs under the sun. For both domestic and commercial applications Permastop is the right choice to control noise down under.

Condensation & dust protection

When you create an atmosphere of warmth or coolness inside the building or home in contrast to the outside temperature, condensation can form on the underside of the metal roof or wall.
To aid in the control of condensation Permastop is faced with a moisture barrier of high quality Sisalation® foil. Not only does the Sisalation enhance the thermal quality of Permastop glasswool insulation it also acts as a non-permeable barrier to moisture. Another bonus is that the transmission of dust is reduced and in bushfire prone areas Permastop assists in preventing burning embers from entering the roof space. Permastop glasswool insulation is non-combustible.

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18 m2






18 m2






12 m2






12 m2






12 m2






12 m2






7.8 m2


The benefits of Permastop Building Blanket

  • Provides excellent thermal insulation properties, keeping homes and buildings cooler in summer and warmer in winter.
  • Minimises the risk of condensation.
  • Reduces energy usage to deliver cost savings.
  • Excellent acoustic properties – reduces rain noise.
  • Faced with industry leading Sisalation® reflective foil laminate in your choice of Light, Medium or Heavy duty strength.
  • Available in customised lengths to improve installation efficiencies.
  • FBS-1 Glasswool Bio-Soluble Insulation® – safe to use.
  • Good Environmental Choice Australia (GECA) certified.
  • Codemark certified.
  • Manufactured from up to 80% recycled content.
  • Satisfies Bushfire Attack Level (BAL) requirements of 0-40 in roof applications and 0-FZ in wall applications (in accordance with AS 3959 – 2009).
  • Australian made.

High Quality Performance

Permastop glasswool blanket insulation is made in Australia to Australian standards using FBS-1 bio soluble glasswool. Fletcher Permastop has the best possible fire rating when tested to AS1530.3. Early fire Hazard requirements. The glasswool component is noncombustible and the Sisalation® used has a flammability index of less than 5 when tested to AS1530.3. Guaranteed for the life of the home, Permastop is the quality choice of leading builders and roofers.

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